Westrail S class

Westrail S class
S2106 in July 2008
Type and origin Power type Diesel-electric Builder Clyde Engineering, Forrestfield Model Electro Motive Diesel JT42C Build date 1998 Total produced 11
Specifications Configuration: ​  • AAR C-C  • UIC Co-Co, Co′Co′ Gauge 3 ft 6 in (1,067 mm) Length 20.8 m (68 ft 3 in) Loco weight 116 long tons (117.9 t; 129.9 short tons) Fuel type Diesel Prime mover Electro Motive Diesel 12N-710GB-ES
Performance figures Maximum speed 115 km/h (71 mph) Power output 3,010 hp (2,240 kW) Tractive effort 74,440 lbf (331.1 kN)
Career Operators Westrail Number in class 11 Numbers S3301–S3311 First run 6 March 1998 Current owner Aurizon Disposition 11 in service

The S class are a class of diesel locomotives built by Clyde Engineering, Forrestfield for Westrail in 1998.

The S class were the first dual-cab locomotives purchased by Westrail. In May 1996 nine were ordered from Clyde Engineering as part of an order that also included 15 standard gauge Q class locomotives. The order later extended to eleven. They are an evolution of the FreightCorp 82 class. All were assembled at a facility established by Clyde Engineering within Westrail's Forrestfield Depot to fulfill the contract. The frames were built at Clyde's Somerton plant with other components manufactured at Kelso.

The S class locomotives entered service in June 1998 hauling ore and mineral trains in South West Western Australia. All were in service by November 1998

All were included in the sale of Westrail to Australian Railroad Group in December 2000, with the class redesignated as the 3300 class. In June 2006, all were included in the sale of Australian Railroad Group's Western Australian operation to QR National.